Were any tests run? Such as EKG or Echo? Even a simple chest X-Ray. You don't say. Have you gone through the ER for evaluation? Ally
It could be a heart condition and/or a concomitant issue as well. To rule out any serious condition you should have tests to rule out any serious condition. Sometimes or almost always treatment can prevent further progression and even reverse the condition...so it would be wise to have tests to rule out anything serious and make a correct diagnosis.
Thanks for your question, and if you have any further questions or comments you are welcome to respond. Take care,
Ken